Good Job on the Maisen, sucks the J14 went in. You need to do like I do add a small 4cell NM 350ma for a reciever bat. That way if you loose your battery to the motor you still have a chance to land it. And its minimal on the weight gain. I use the little electrifly battery's. My RBC F35 starts waddling like a duck when its getting ready to stall lets you know you better be on the ground or adding power real soon. I lost one plane to a battery failure, and then I switched to the small battery for the reciever and pull the red wire to the bec